package com.citms.config;

import static com.google.common.collect.Lists.newArrayList;
import static springfox.documentation.schema.AlternateTypeRules.newRule;

import java.util.List;
import java.util.Map;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;

import com.citms.common.ResultInfo;
import com.fasterxml.classmate.TypeResolver;

import io.swagger.annotations.ApiOperation;
import springfox.documentation.builders.ApiInfoBuilder;
import springfox.documentation.builders.PathSelectors;
import springfox.documentation.builders.RequestHandlerSelectors;
import springfox.documentation.schema.WildcardType;
import springfox.documentation.service.ApiInfo;
import springfox.documentation.service.ApiKey;
import springfox.documentation.spi.DocumentationType;
import springfox.documentation.spring.web.plugins.Docket;
import springfox.documentation.swagger2.annotations.EnableSwagger2;

@Configuration
@EnableSwagger2
public class SwaggerConfig implements WebMvcConfigurer {

	 @Override
    public void addResourceHandlers(ResourceHandlerRegistry registry) {
        registry.addResourceHandler("swagger-ui.html").addResourceLocations("classpath:/META-INF/resources/");
        registry.addResourceHandler("/webjars/**").addResourceLocations("classpath:/META-INF/resources/webjars/");
        registry.addResourceHandler("/swagger/**").addResourceLocations("classpath:/static/swagger/");
    }
	
	@Autowired
    private TypeResolver typeResolver;

    @Bean
    public Docket createRestApi() {
        return new Docket(DocumentationType.SWAGGER_2)
            .apiInfo(apiInfo())
            .select()
            //加了ApiOperation注解的类，才生成接口文档
            .apis(RequestHandlerSelectors.withMethodAnnotation(ApiOperation.class))
            //包下的类，才生成接口文档
            //.apis(RequestHandlerSelectors.basePackage("com.citms.controller"))
            .paths(PathSelectors.any())
            .build()
            .securitySchemes(security())
           .alternateTypeRules( //自定义规则，如果遇到DeferredResult，则把泛型类转成json
            		newRule(
            				typeResolver.resolve(ResultInfo.class,WildcardType.class),
            				typeResolver.resolve(WildcardType.class)
            				),
            		newRule(
            				typeResolver.resolve(ResultInfo.class,typeResolver.resolve(Map.class ,String.class,WildcardType.class)),
            				typeResolver.resolve(Map.class ,String.class,typeResolver.resolve(WildcardType.class))
            				)
            		)
            ;
    }

    private ApiInfo apiInfo() {
        return new ApiInfoBuilder()
            .title("citms")
            .description("接口文档")
            .termsOfServiceUrl("http://www.citms.cn")
            .version("2.1")
            .build();
    }

    private List<ApiKey> security() {
        return newArrayList(
            new ApiKey("authorization", "authorization", "header")
        );
    }

}